.modalwrapper {
  width: 100%;
  position: fixed;
  left: 0;
  z-index: 999;
  .mark {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 997;
    background: #333;
    opacity: 0.6;
    width: 100%;
    height: 2000px;

  }
  .content {
    position: fixed;
    left: 0;
    width: 100%;
    z-index: 999;
    background: #fff;

  }
}